A metasurface-based full-color circular auto-focusing Airy beam transmitter for stable high-speed underwater wireless optical communications

Junhui Hu, Zeyuan Guo, Jianyang Shi, Xiong Jiang, Qinmiao Chen, Hui Chen, Zhixue He, Qinghai Song, Shumin Xiao (), Shaohua Yu, Nan Chi () and Chao Shen ()
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Junhui Hu: Fudan University
Zeyuan Guo: Harbin Institute of Technology
Jianyang Shi: Fudan University
Xiong Jiang: Harbin Institute of Technology
Qinmiao Chen: Harbin Institute of Technology
Hui Chen: Peng Cheng Laboratory
Zhixue He: Peng Cheng Laboratory
Qinghai Song: Harbin Institute of Technology
Shumin Xiao: Harbin Institute of Technology
Shaohua Yu: Fudan University
Nan Chi: Fudan University
Chao Shen: Fudan University

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract Due to its unique intensity distribution, self-acceleration, and beam self-healing properties, Airy beam holds great potential for optical wireless communications in challenging channels, such as underwater environments. As a vital part of 6G wireless network, the Internet of Underwater Things requires high-stability, low-latency, and high-capacity underwater wireless optical communication (UWOC). Currently, the primary challenge of UWOC lies in the prevalent time-varying and complex channel characteristics. Conventional blue Gaussian beam-based systems face difficulties in underwater randomly perturbed links. In this work, we report a full-color circular auto-focusing Airy beams metasurface transmitter for reliable, large-capacity and long-distance UWOC links. The metasurface is designed to exhibits high polarization conversion efficiency over a wide band (440-640 nm), enabling an increased data transmission rate of 91% and reliable 4 K video transmission in wavelength division multiplexing (WDM) based UWOC data link. The successful application of this metasurface in challenging UWOC links establishes a foundation for underwater interconnection scenarios in 6G communication.

Date: 2024
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DOI: 10.1038/s41467-024-47105-x

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